关键词: 京津冀 , 协同创新 , 虹吸效应 , 财税政策

Abstract: This paper tries to verify the existence of the Syphonage Effect upon the collaborative innovation in the BeijingTianjinHebei metropolitan region (BJTJHE). Taking hightech enterprises that had been publicly listed between 2009 and 2015 in BJTJHE and the Pearl River Delta (PRD) as a sample, this paper aims to analyze the difference of R&D intensity among BJTJHE enterprises. As research shown, BJTJHE enterprises have much higher R&D intensity compared to those from PRD. Meanwhile, since a converging trend has been shown among multiple enterprises in terms of R&D intensity, the “Syphonage Effect” is nonexistent. This phenomenon is distinct from the polarization on R&D intensity between Shenzhen and Guangzhou enterprises in PRD.

Key words:  BeijingTianjinHebei region , collaborative innovation , Syphonage , finances and taxation policies